The invention provides an improved kitchen knife, and belongs to the field of daily life. By adoption of the improved kitchen knife, the problems that in the prior art, food materials cannot be cut more effortlessly is solved. The improved kitchen knife comprises a blade and a handheld part. The cross section of the handheld part is semicircular. The handheld part comprises a first mounting part and a second mounting part. A first sliding groove is formed in the first mounting part, and a second sliding groove is formed in the second mounting part. A connecting piece is further arranged on the handheld part. The cross section of the blade is also semicircular. A semicircular sliding groove is formed in one side face of the first mounting part. A pushing assembly is arranged in a cavity and comprises a moving block and a positioning block. A groove is formed in the moving block, a squeezing spring is arranged in the groove, and the other end of the squeezing spring is fixed to the positioning block. A clamping block is further fixed to one end of the positioning block. The second mounting part is provided with a spare blade. The improved kitchen knife has the advantage that food materials can be cut more effortlessly.