A child car safety seat comprising: a base; a seat body configured to be installed on the base and at least two lateral shock absorbers, the two lateral shock absorbers each comprising: a protective fender pivoted to the base and pivotally switchable between a folded state or an unfolded state relative to the base; a locking mechanism for selectively engaging with the protective fender to restrain the protective fender from switching to the unfolded state or disengaging from the protective fender to allow the protective fender to switch to the unfolded state when the protective fender is located in the folded state; and a resilient component for biasing the protective fender to switch to the unfolded state wherein the locking mechanism is operable by the seat body to sequentially switch to a first state and a second state while the seat body is installed on the base, wherein when the locking mechanism is in the first state, the protective fender is allowed to switch to the unfolded state and when the locking mechanism is in the second state, the locking mechanism can engage with the protective fender switching from the unfolded state to the folded state. a base; a seat body configured to be installed on the base and at least two lateral shock absorbers, the two lateral shock absorbers each comprising: a protective fender pivoted to the base and pivotally switchable between a folded state or an unfolded state relative to the base; a locking mechanism for selectively engaging with the protective fender to restrain the protective fender from switching to the unfolded state or disengaging from the protective fender to allow the protective fender to switch to the unfolded state when the protective fender is located in the folded state; and a resilient component for biasing the protective fender to switch to the unfolded state wherein the locking mechanism is operable by the seat body to sequentially switch to a first state and a second state while the seat body is installed on the base, wherein when the locking mechanism is in the first state, the protective fender is allowed to switch to the unfolded state and when the locking mechanism is in the second state, the locking mechanism can engage with the protective fender switching from the unfolded state to the folded state. a protective fender pivoted to the base and pivotally switchable between a folded state or an unfolded state relative to the base; a locking mechanism for selectively engaging with the protective fender to restrain the protective fender from switching to the unfolded state or disengaging from the protective fender to allow the protective fender to switch to the unfolded state when the protective fender is located in the folded state; and a resilient component for biasing the protective fender to switch to the unfolded state wherein the locking mechanism is operable by the seat body to sequentially switch to a first state and a second state while the seat body is installed on the base, wherein when the locking mechanism is in the first state, the protective fender is allowed to switch to the unfolded state and when the locking mechanism is in the second state, the locking mechanism can engage with the protective fender switching from the unfolded state to the folded state.