The invention discloses an auxiliary connecting structure for a lift car wall and a lift car bottom of an elevator, wherein a support plate is fixedly connected onto the lift car bottom and comprises a support part and a blocking part positioned outside the lift car bottom, an upwards open gap is formed between the blocking part and the lift car bottom, the lower end part of the lift car wall is downwards inserted into the gap and is supported by the support part, and the blocking part is blocked outside the lower end part of the lift car wall. The lift car wall is supported through the support part, and the blocking part blocks the lift car wall, so workers can connect the lift car wall with the lift car bottom through screw bolts and screw nuts only through slightly holding the lift carwall during the installation instead of supporting the lift car wall by force, the fixed installation between the lift car wall and the lift car bottom is completed, the labor is saved during the connection installation operation of the lift car wall and the lift car bottom through the auxiliary connecting structure, and the installation efficiency is high.