Squeezing　properties　in　the　nondegenerate　two-photon　Jaynes-Cummings　model　are　investigated.　The　effects　of　direct　selective　atomic　measurement　and　the　application　of　the　classical　field　followed　by　atomic　measurement　are　analyzed.　Different　values　of　the　parameters　of　the　classical　field　are　taken　into　account.　It　is　found　that　the　field　squeezing　can　be　enhanced　by　measurement.　©　International　Academic　Publishers.