The invention discloses an automobile aluminum alloy welcome pedal convenient to dismount, which comprises a welcome pedal body. One end of the welcome pedal body is fixedly connected with a mountingblock, symmetrical circular grooves are formed in the left end and the right end inside the mounting block, a circular through hole is formed in the end, close to the outer part of the mounting block,of the circular groove, a fixing rod is arranged in the circular groove, the other end of the fixing rod communicates with the outer part of the mounting block through the circular through hole, thebottom end of the welcome pedal body is fixedly connected with an L-type supporting part, the welcome pedal body is made of aluminum alloy, the automobile aluminum alloy welcome pedal has multiple advantages of being light in weight, low in cost, saving in energy, reduction in emission and the like, at the same time, mounting and dismounting of the welcome pedal body can be realized through the mutual cooperation of a fixing rod, a push rod and a compression spring, very convenience is realized, further, a lighting is arranged outside the pedal, during the night, passengers can press a switchwith feet, so that the lighting lights terrain beside an automobile, passengers getting on or off the automobile in the night is advantageous, and very convenience is realized.