Nest type mattress for newborn baby

The utility model discloses a nest type newborn mattress which comprises a hard mattress and a U-shaped blocking body which is arranged on the hard mattress and can adjust the size of the space, a groove is formed in the hard mattress, the groove is formed in the space defined by the U-shaped blocking body, a plurality of splicing connecting blocks are arranged in the groove, and the connecting blocks and the hard mattress are located on the same horizontal plane. A humidity sensor is arranged in the groove, and an alarm electrically connected with the humidity sensor is arranged on one side of the exterior of the hard mattress. The mattress has the effects of touching and massaging; the size of the space can be adjusted according to different postures, so that the newborn generates boundary feeling and safety feeling; due to the design of the cartoon pattern or the color pattern on the upper portion of the inner side of the U-shaped blocking body, newborn vision can be trained, and the music box is arranged