Analysis of the ?1(1855) as a <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:mi>K</mml:mi><mml:msub><mml:mrow><mml:mover accent="true"><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mo stretchy="false">¯</mml:mo></mml:mrow></mml:mover></mml:mrow><mml:mrow><mml:mn>1</mml:mn></mml:mrow></mml:msub><mml:mo stretchy="false">(</mml:mo><mml:mn>1400</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> molecular state

In this work, we study the radiative and strong decay of $S$-wave $K\bar{K}_1(1400)$ molecular state within effective Lagrangians approach find relation between newly observed $\eta_1(1855)$ by comparing with BESIII observation. The prediction indicates that width can reach up to $182.97^{+2.79}_{-3.50}$ MeV, which be confronted experimental data. If could state, $K\bar{K}^{*}\pi$ three-body provides dominant contribution, not $\eta\eta^{'}$ channel found in experiment. addition, partial for $\eta_1(1855)\to\gamma{}\phi$ $17.95^{+0.21}_{-0.43}$ KeV. Those results measured future experiments used test nature $\eta_1(1855)$.