diff --git a/externals/kyuubi-spark-sql-engine/src/main/scala/org/apache/kyuubi/engine/spark/schema/RowSet.scala b/externals/kyuubi-spark-sql-engine/src/main/scala/org/apache/kyuubi/engine/spark/schema/RowSet.scala
index ba6d9c9f4..47407d48e 100644
--- a/externals/kyuubi-spark-sql-engine/src/main/scala/org/apache/kyuubi/engine/spark/schema/RowSet.scala
+++ b/externals/kyuubi-spark-sql-engine/src/main/scala/org/apache/kyuubi/engine/spark/schema/RowSet.scala
@@ -90,7 +90,7 @@ object RowSet {
 
       case FloatType =>
         val values = getOrSetAsNull[java.lang.Float](rows, ordinal, nulls, 0.toFloat)
-          .asScala.map(n => java.lang.Double.valueOf(n.toDouble)).asJava
+          .asScala.map(n => java.lang.Double.valueOf(n.toString)).asJava
         TColumn.doubleVal(new TDoubleColumn(values, nulls))
 
       case DoubleType =>
@@ -176,7 +176,10 @@ object RowSet {
 
       case FloatType =>
         val tDoubleValue = new TDoubleValue
-        if (!row.isNullAt(ordinal)) tDoubleValue.setValue(row.getFloat(ordinal))
+        if (!row.isNullAt(ordinal)) {
+          val doubleValue = java.lang.Double.valueOf(row.getFloat(ordinal).toString)
+          tDoubleValue.setValue(doubleValue)
+        }
         TColumnValue.doubleVal(tDoubleValue)
 
       case DoubleType =>
diff --git a/externals/kyuubi-spark-sql-engine/src/test/scala/org/apache/kyuubi/engine/spark/schema/RowSetSuite.scala b/externals/kyuubi-spark-sql-engine/src/test/scala/org/apache/kyuubi/engine/spark/schema/RowSetSuite.scala
index 96d544bf5..803eea3e6 100644
--- a/externals/kyuubi-spark-sql-engine/src/test/scala/org/apache/kyuubi/engine/spark/schema/RowSetSuite.scala
+++ b/externals/kyuubi-spark-sql-engine/src/test/scala/org/apache/kyuubi/engine/spark/schema/RowSetSuite.scala
@@ -142,7 +142,7 @@ class RowSetSuite extends KyuubiFunSuite {
     val floatCol = cols.next().getDoubleVal
     floatCol.getValues.asScala.zipWithIndex.foreach {
       case (b, 11) => assert(b === 0)
-      case (b, i) => assert(b === java.lang.Float.valueOf(s"$i.$i"))
+      case (b, i) => assert(b.toFloat === java.lang.Float.valueOf(s"$i.$i"))
     }
 
     val doubleCol = cols.next().getDoubleVal
@@ -226,7 +226,7 @@ class RowSetSuite extends KyuubiFunSuite {
 
     val r4 = iter.next().getColVals
     assert(r4.get(4).getI64Val.getValue === 3)
-    assert(r4.get(5).getDoubleVal.getValue === 3.3f)
+    assert(r4.get(5).getDoubleVal.getValue.toFloat === 3.3f)
 
     val r5 = iter.next().getColVals
     assert(r5.get(6).getDoubleVal.getValue === 4.4d)
diff --git a/kyuubi-server/src/test/scala/org/apache/kyuubi/engine/spark/SparkSqlEngineSuite.scala b/kyuubi-server/src/test/scala/org/apache/kyuubi/engine/spark/SparkSqlEngineSuite.scala
index de74c8478..461a82870 100644
--- a/kyuubi-server/src/test/scala/org/apache/kyuubi/engine/spark/SparkSqlEngineSuite.scala
+++ b/kyuubi-server/src/test/scala/org/apache/kyuubi/engine/spark/SparkSqlEngineSuite.scala
@@ -124,5 +124,13 @@ class SparkSqlEngineSuite extends WithKyuubiServer with HiveJDBCTestHelper {
     }
   }
 
+  test("KYUUBI-1784: float types should not lose precision") {
+    withJdbcStatement() { statement =>
+      val resultSet = statement.executeQuery("SELECT cast(0.1 as float) AS col")
+      assert(resultSet.next())
+      assert(resultSet.getString("col") == "0.1")
+    }
+  }
+
   override protected def jdbcUrl: String = getJdbcUrl
 }